JPH0329869Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Field of the Invention> This invention relates to an electromagnetic relay with an improved hinge structure for swingably supporting a movable iron core on an iron core frame.

<Prior art and its problems> Conventionally, as an electromagnetic relay, a
An iron core is fixed parallel to the horizontal part, a coil is wound around the outer periphery of this iron core via a spool, and the tip of the horizontal part of the iron core frame can be freely attracted to and separated from the magnetic pole surface at the tip of the iron core. A type with a movable iron core supported by a hinge is known.

However, between the movable iron piece and the iron core frame, a bearing fitting is required to adjust the position of the movable iron piece and prevent uneven contact with the iron core.
The number of assembly steps was increased and the structure was complicated.

In order to improve this, conventionally, a pair of hinge legs facing each other are integrally formed on both sides of the distal end of the horizontal part of the iron core frame, and the hinge pin is inserted and supported in the pin hole formed on the opposing surface, and the above-mentioned movable An electromagnetic relay is known in which an iron piece is rotatably supported by the hinge pin with a pin holding plate fixed to the iron piece. (Jitko No. 41-3152 and Jitko No. 39
However, according to the above configuration, each hinge leg is formed to protrude outward from both sides of the tip of the horizontal portion of the iron core frame, that is, in a direction away from the tip magnetic pole surface of the iron core. , the electromagnetic relay becomes larger in the radial direction of the iron core.

In addition, the spool around which the coil is wound is fixed together only by fixing the proximal end of the core inserted into the spool and the core frame. The resin spool may be damaged. Therefore, if this fixation is incomplete or due to repeated impacts caused by the adhesion of the movable iron piece to the tip pole surface of the iron core during operation, the iron core changes over time and wobbling occurs. If the coil is energized in such a state, not only will the spool vibrate and a humming noise will be generated, but the coil lead wire for energizing the coil will be disconnected at the connection with the coil terminal. Furthermore, since the vibration of the spool is larger at the tip end magnetic pole surface of the iron core than at its base end, there is a problem that if a Kumatori coil is set on the magnetic pole surface, it may be damaged or missing.

<Purpose of the invention> This invention was made to improve the above-mentioned drawbacks, and the purpose is to provide an electromagnetic relay that has a simple configuration, can prevent failures, is compact, and is easy to manufacture and assemble. do.

<Structure and effects of the invention> The electromagnetic relay according to this invention has a pair of hinge legs integrally formed on both sides of the horizontal part of the iron core frame, facing each other, and protruding toward the magnetic pole surface side of the tip of the iron core. A projecting piece extending in the axial direction and abutting the spool is provided on each of the hinge legs, and the spool is held and positioned in the axial direction between the projecting piece and the vertical part of the iron core frame. do.

According to the above configuration, each hinge leg is formed to protrude inwardly from both sides of the tip of the horizontal part of the iron core frame, that is, in the direction of the tip magnetic pole surface of the iron core, so that the electromagnetic relay is small in the radial direction of the iron core. In addition, since each hinge leg can be set by effectively utilizing the wasted space where the movable iron piece rotates, the electromagnetic relay does not become larger in the axial direction of the iron core. Therefore, the overall configuration of the electromagnetic relay can be downsized.

Furthermore, since the spool around which the coil is wound is held in the axial direction between the protrusion protruding from the hinge leg and the vertical part of the iron core frame, the proximal end of the iron core through which the spool is inserted is Even if the coil is not completely fixed to the core frame, or if the coil changes over time and rattles due to repeated impacts caused by the adhesion of the movable iron piece to the tip pole surface of the core during operation, When energized, the spool may vibrate and make a whirring noise, the coil lead wire may break at the connection with the coil terminal, or even if a Kumatori coil is set on the magnetic pole surface, it may be damaged. , there is no risk of it being lost.

Furthermore, the spool clamping means can be achieved by a simple structure in which a protrusion that abuts the spool is provided protruding from each of the hinge legs.

In addition, since the spool is held between the protrusion protruding from the hinge leg and the vertical part of the core frame, the base end of the core through which the spool is inserted is fixed to the core frame. Since firm fixing is not required, breakage of the spool during fixing can be effectively prevented, and manufacturing and assembly work can be facilitated.

<Description of Embodiments> Hereinafter, embodiments of this invention will be described based on the drawings.

FIG. 1 is a partially cutaway side view of an electromagnetic relay according to an embodiment of this invention. In this figure, 9
is a base, and inside this base 9 there is a movable insulating stand 10 that can slide freely in the direction of arrow A, and this movable insulating stand 1.
A compression spring 11 biasing the stroke end in the direction of arrow _A1 is disposed. The movable insulating table 10 includes a movable contact piece 12 that is slidable in the direction of arrow A;
A contact spring 13 is provided which urges the movable contact piece 12 toward the stroke end in _{the two} directions of arrow A.
As clearly shown in FIG. 2, movable contacts 14 are formed at both ends of the movable insulating table 10 that protrude from both sides. Further, as shown in FIG. 2, a fixed contact piece 16 provided with a fixed contact 15 corresponding to each movable contact 14 is fitted and fixed to the base 9, as shown in FIG. Furthermore, in Figure 1, 17 is 1
A pair of coil terminals (only one side is shown) are fitted to the base 9 with the movable insulating stand 10 sandwiched therebetween, in the same way as the fixed contact piece 16 described above.

As shown in FIG. 1, an electromagnet 19 is placed on the base 9 with an insulating plate 18 in between. electromagnet 19
An L-shaped core frame 20 consisting of a vertical portion 20a and a horizontal portion 20b, an iron core 21 that is arranged parallel to the horizontal portion 20b and whose base end 21b is caulked and fixed to the vertical portion 20a; A coil 23 is wound around the outer periphery of the iron core 21 via a spool 22.
and a curling coil 24 which is fixed to the tip of the iron core 21 by caulking or the like and is locked to the collar 22d at one end of the spool 22. When the electromagnet 19 is placed on the insulating plate 18, the upper end 17a of the coil terminal 17 is fitted into the slit 22c of the block 22b protruding from the other end flange 22a of the spool 22, and the electromagnet 19 is placed on the insulating plate 18. positioned above.

As shown in FIG. 3, a pair of opposing pin holes 20c,
Hinge legs 20d, 20d having 20c are integrally formed. This pair of pin holes 20c, 20c
A hinge pin 26 made of a magnetic material is inserted and supported, and then between both hinge legs 20d, 20d,
A curled portion 27a formed at the lower part of the pin holding plate 27 made of a magnetic material is held by the hinge pin 26, and the pin holding plate 27 is fixed to the movable iron piece 29 by screws 28, 28. As a result, the movable iron piece 29 is regulated in its lateral position between both hinge legs 20d, 20d, and the hinge pin 26 is held between the movable iron piece 29 and the curled portion 27a of the pin holding plate 27, as shown in FIG. , the movable iron piece 29 is fixed to the hinge pin 26, and the movable iron piece 29 is attracted to the tip magnetic pole surface 21a of the iron core 21.
They face each other freely. Further, as the electromagnet 19 is placed on the insulating plate 18, the lower operation piece 29a of the movable iron piece 29 is swingably engaged with the recess 10a provided at one end of the movable insulating table 10. There is.

Further, as shown in FIG. 3, the hinge legs 20d, 2
Projecting pieces 20e, 20e are integrally formed on 0d. As shown in FIG. Part 20a
It is in a state where it is sandwiched in the axial direction between the two.

In FIG. 1, a case 30 is fitted onto the base 9. At the time of this fitting, the stoppers 30a and 30b inside the case 30 act on the outer surfaces of the flanges 22a and 22d at both ends of the spool 22, and
Case upper surface part 30c is both end flange parts 22a, 22d
The electromagnet 19 acts on the upper end of the insulating plate 18.
Fixed on top.

Next, the operation of the above configuration will be explained.

In FIG. 1, when the coil 23 is energized,
The movable iron piece 29 is rotated clockwise by the hinge pin 26 and is attracted to the tip magnetic pole face 21a of the iron core 21, as shown in FIG. At this time, the movable insulating base 10 is shifted in the direction of arrow _A2 against the compression spring 11 by the lower operation piece 29a of the movable iron piece 29, and the movable contact 14 is pressed against the fixed contact 15. In the state shown in FIG. 4, when the current to the coil 23 is cut off, the tension of the compression spring 11 causes all of the
Return as shown in the figure.

According to the above configuration, each hinge leg 20d, 20d
is inward from both sides of the horizontal part of the iron core frame 20,
In other words, since it is formed to protrude in the direction of the tip magnetic pole surface 21a of the iron core 21, the electromagnetic relay
The electromagnetic relay can be made smaller in the radial direction of the iron core 21, and the hinge legs 20d, 20d can be set by effectively utilizing the wasted space where the movable iron piece 29 rotates, so the electromagnetic relay can be made larger in the axial direction of the iron core 21. There is no. Therefore, the overall configuration of the electromagnetic relay can be downsized.

In addition, a spool 22 around which a coil 23 is wound
The protrusions 20e, 20e protruding from the hinge legs 20d, 20d and the vertical portion 20 of the iron core frame 20
The proximal end 21 of the iron core 21 through which the spool 22 is inserted is held in the axial direction between the
b is incompletely fixed to the core frame 20,
Even if the spool 22 vibrates due to the energization of the coil 23, even if the spool 22 vibrates due to the energization of the coil 23, even if the spool 22 changes over time due to repeated impacts caused by the attraction of the movable iron piece 29 to the tip pole surface 21a of the iron core 21 during operation. There is no risk of generating a whirring noise, breaking the lead wire of the coil 23 at the connection part with the coil terminal 17, or damaging or missing the Kumatori coil 24 set on the magnetic pole surface 21a.

Furthermore, the means for holding the spool 22 can be achieved by a simple structure in which protrusions 20e, 20e that abut the spool 22 are provided protruding from the respective hinge legs 20d, 20d.

Moreover, the spool 22 has hinge legs 20d,
Since it is held between the protrusions 20e, 20e protruding from 20d and the vertical portion 20a of the core frame 20, the proximal end 21b of the core 21 through which the spool 22 is inserted is held against the core frame 20. When fixing, since particularly firm fixing is not required, breakage of the spool 22 during fixing can be effectively prevented, and manufacturing and assembly work can be facilitated.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of an electromagnetic relay according to an embodiment of the invention, Fig. 2 is a plan view of the contact portion,
FIG. 3 is a perspective view showing the hinge structure of the movable iron piece, and FIG. 4 is an operational view of FIG. 1. 20... Iron core frame, 20a... Vertical part, 20b...
...Horizontal part, 20c...Pin hole, 20d...Hinge leg, 20e...Protrusion piece, 21...Iron core, 21a...
Tip magnetic pole surface, 21b... base end, 22... spool, 23... coil, 26... hinge pin, 27
...Pin holding plate, 29...Movable iron piece.

Claims (1)

[Scope of utility model registration request] An iron core frame bent into an approximately L-shape, an iron core arranged parallel to the horizontal part of the iron core frame and having its base end fixed to the vertical part, and an iron core that is inserted into the outer periphery of the iron core. A spool around which a coil is wound, a movable iron piece that is removably arranged opposite to the tip magnetic pole surface of the iron core, and a movable iron piece that is arranged opposite to each other so as to be attachable and detachable to the tip magnetic pole surface of the iron core; a pair of hinge legs that are integrally formed and project from each other and have pin holes on opposing surfaces; a hinge pin made of a magnetic material that is inserted and supported in each of the pin holes; and a hinge pin that is fixed to the movable iron piece and that is attached to the hinge pin. The pin retaining plate made of a magnetic material is rotatably supported, and the vertical part of the iron core frame extends in the axial direction of the iron core and projects from each of the hinge legs and comes into contact with the spool. An electromagnetic relay characterized by comprising a positioning protrusion that holds the spool in the axial direction.